Rock-drilling mechanism



Jan. 12 1926.

E. G. GARTEN ROCK DRILLING MECHANISM Y Filed July 1 Patented Jan. 12, 1926.

lTE STATES PATENT QFFICE.

ELMER G. GARTIN, OF CLAREIVJONT, NEW' HAMPSHIRE, .ASSIGNOR TO SULLIVAN MA- CHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

ROCK-DRILLING MECHANISM.

Application led July 1,

fu ZZ iii/"rom t may concern:

Be it known that T, ELMER G. GARTIN, a citizen oif the United States, residing at Claremont, in the county of Sullivan and 'tate ot la' ew Hampshire, have invented certain new and uset'ul Improvements in Rocklh'illing Mechanisms, of which the following is a full, clear, and exact specilication.

My invention relates to rock drilling mechanisms, and more particularly. to imircved feeding mechanisms for use therewith.

The object of my invention is to provide an improved rock drilling mechanism. Ancther object ot my invention is to provide an improved feeding mechanism of general application and provided with novel and improved controlling means. A further ob- `iect ot my invention is to provide an improved controlling means for pressure fluid feeding mechanisms especially adapted for use in rock drilling operations and comprisiing control means located in juxtaposition to one another whereby the drillingtool and the feeding mechanism may be simultaneously controlled by the operator with the use o1" but one hand. Other objects and advantages of my invention will be apparent in the course ot' the following specification and appended claims.

In the accompanying drawings, I have shown for purposes ot illustration two forms which my invention may assume in practice.

ln these drawing. K

Fig. l is a view partially in elevation and partially broken away showing a drilling mechanisn'i embodying my improved construction.

Fig. 2 is a. transverse section on the line 2--2 of Fig. 1.

Fig. 3 is a section on the broken line 343 of Fig. 2.

Fig. 4 is a view showing one position of the valve and illustrating' sections on the lines a-rt and -b of Fig. 2.

Fig. 5 is a similar view with the parts in a diderent position.

Fig. 6 is a section corresponding to Fig. and showing a modification.

For purposes of illustration I have shown my improved feeding mechanism employed in connection with a percussive motor 1 of well known commercial form, which motor is adapted to impart a series of blows to a drill steel 2 and is maintained in proper 1921. serial No. 481,974.

spaced relation to said drill steel as the hole is deepened by a feed mechanism 3. This ikcdmg mechanism comprises a cylinder 4 having a bore 5 in which a piston 6 provided with a piston rod 7 is longitudinally reciprocable. The piston rod 7 is provided with :i point 3 adapted to rest against a wallet a stops or some other suitable abutment and to7 when it is held stationary, cause relative movements between the piston 6 and the cylinder 4 to take the form ot movements of the cylinder 4 and drill 1 while the piston remains stationary. I have provided controlling mechanisms for the feeding mechanism and for the motor 1 comprising a chamber 9 formed in a member 10 interposed between the rear head of the motor 1 and the 'feeding mechanism. 3. Disposedwithin the chamber 9 is a bushing 11 having a conical bore as indicated at 12 and rotatable within said bore is a conical valve 13. The bushing 11 is traversed by a port 14 through which fluid is supplied tor use in the motor 1 and by a port 15 leading to a passage 16 communicating with the forward end of the :l'eed cylinder bore 4. The valve 13 which is conical in shape to fit the bore 12 of the bushing is hollow as indicated at17 and communicates with a fluid vsupply line 18. Traversing the wall of the valve and communieating withl the chamber 17 is a port 19 which is adapted to communicate with the port 14 when the valve is rotated by its handleEZO. A bore 21 is formed coaxially in. the valve and communicates at its 'forward end by a small passage 22 with the chamber 17. Opening laterally from the bore 21 is a passage 23 communicating with a groove 24 extending longitudinally of the valve in the periphery thereof. This groove communicates'with a circumferentially eX- tending groove 25 which is adapted to cooperate with the port 15. Means operative to connect the port 15 with a vent 26 is also ifo "med in the periphery of the valve as indicated at 27. A valve 28 having a generally conical end and with laterally cutaway portions atydiametrically opposite sides as indicated at 29 is longitudinally reciprocable but held from rotation in the bore 21, and is provided with a head 30 againstwhich a spring 31 presses to maintain the valve in such position as to provide a freecommunication between the ports 22 and 23. A handle 32 pivoted at 33 on the main operating handle 30 is adapted to, when squeezed by the operator, cause the closing of the valve .28 and interrupt the communication between the ports 22 and 23.

The mode of operation of this mechanism will be readily apparent. lt will be evident that by turning the handle 2O the valve l2 will be caused to rotate in such manner as to bring about communication between the groove and the port l5 and also communication betn'een the port 19 and the port 14. As a result the feeding mechanism will be placed 4in operation and the drill motor l started. If it is 'desired to interrupt the feed, it will be evident that by squeezing the handle 32tovvard` the handle 20, this will be readily accomplished, as With no more air supplied to the front end of the feed cylinder leakage will tend to reduce the pressure in the feeding mechanism and even were leakage tobe entirely eliminated, but a short movement of the cylinder el relative tothe piston G would be necessary before the pressure Withinthe feed cylinder would drop sufficiently due to expansion to practically eliminate pressa-e of the tool against the Werl-: Also, if it be desired to regulate the pressure rather closely, this can be accomplished by momentarily openingl the valve 28 only for such periods of time as Will be necessary to maintain the desired pressure in the feeding mechanism.

In Fig. 6 l shonT another form which my invention may assume in practice. In this case, the construction is identical With the exception of the fact that instead of being an end seating valve, the valve 28 is of the piston type and is prevented from rotating y by any suitable means, and a passage 22 ll ti having a lateral communication with the chamber 2l is controlled by af groove'l which alternately connects the passage 22 with the port '.3 or interrupts connection when the unbroken surface of the valve 2S is brought opposite the radially extem'ling portion of the port 22. The mode of operation of this species of my invention is identical with that previously described, due allowance being made for the type of valve employed.

lyVhile I have in this application specifically described tivo forms which my invention may assume in pract`ice,fit Will be unlerstood that these forms of the same are shown forpnrposes of illustration and that the invention may be modified and embodied in other forms Without departing from its spirit or the sco-pe ofthe appended claims.`

`WhatV claim as new and desire to secure by Letters Patent is l. A controlling valve mechanism for a roel; drilling motor and feeding means therefor comprising a casing having fluid passages formed therein leading respectively to said motor and said feeding means, a main controlling valve arranged Wit-hin said casing having an operating handle, said valve including means for controlling the fluid flow in said passages, and supplemental feed controlling means including a valve arranged coaxially Within said main valve and reciprocable axially relative thereto for controlling the Huid floiv in the passages leading to said feeding means, said valve having a controlling handle pivotally connected to said main valve operating handle to swing towards and from said handle and operating to close said supplemental valve when said handles are brought together.

2. A controlling' valve mechanisn'i for a rock drilling motor and feeding' means therefor comprising a casing having fluid passages formed therein leading respectively to said motor and said feeding means, a main controlling valve arranged Within said casing having fluid passages formed therein adapted to communicate with said fluid passages, said valve having an operating handle, and supplemental feed controlling means including a. valve arranged coaxially Within said main valve and reciprocable axially relative thereto for controlling the fluid in the passages leading to said feeding means, said valve having a controlling handle pivotally connected to said main valve operating handle to swing towards and from said handle and operating to close said supplemental valve when said handles are brought together and having means for automatically opening said valve when said handles are released.

3. In a pressure fed tool, the combination With a hammer 'drill and a pressure fluid feeding device attached thereto, of independently operable valves, one of which having means for controlling both the feeding mechanism and the tool and the other of which having means for controlling only the feeding mechanism, said valves having overlying handles one of which is rotatable to effect control of its valve and the other of which is movable in a plane at right angles lo the plane of movement of said first menlioned handle.

l. In a pressure fed tool, the combination with a hammer drill, of a pressure fluid feeding device attached thereto, a rotatable valve having means for controlling the supply of motive fluid to said drill and to said feeding device, and a coaxially disposed valve having means for controlling the supply of pressure fluid to said feeding device only, said last mentioned valve beingI reciprocable axially with respect to said first mentioned valve.

5. In a pressure .fedtool, the combination with a hammer drill, of a pressure fluid feeding device Vattached thereto, means including a valve and passages controlled CCY Cal

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thereby for controlling the operation of said drill and of said feeding device, operating means therefor, and auxiliary means for controlling said feeding device comprising a valve and operating means therefor pivoted on said first mentioned operating means movable rotatably with said first mentioned operating means and likewise movable at right angles thereto.

6. In a pressure fed tool, the combination With a hammer drill, of a pressure fluid feeding device attached thereto, and means for controlling the fluid flow to said feeding device comprising coaxially disposed valves both of which partake of movements in one direction and one of which is movable in an additional direction and passages controlled by said valves.

7. A drilling mechanism comprising a drilling motor and pressure fluid feeding means therefor, a throttle valve provided With an operating handle adapted toy be grasped by lthe operator, said valve having means for controlling said motor and said feeding means, and supplemental vcontrolling means Vfor the feeding means including an elementlocated in juxtaposition to said handle to enable the operator to control the pressure Within said feeding means by the hand grasping said handle and Without removing said hand from .said throttleivalve handle.

8. A drilling mechanism comprising a drilling motor and pressure fluid feeding means therefor, a throttle valve provided with an operating handle adapted to be grasped by the operator, said valve having means for 'controlling said motor and said f feeding means, and supplemental feed controlling means including a reciprocable valve having a manually operable actuating element located in juxtaposition to said handle for enabling the operator to control the pressure within said feeding means by but a single hand WithoutV removing said hand from said throttle valve handle.

9.1A drilling mechanism comprising a drilling motor and pressure fluid feeding means therefor, a throttle valve provided` with an operating handle adapted to be grasped by the operator, said valve having means for controlling said motor and said feeding means, and supplemental feed controlling means including a reciprocable valve arranged coaxially Within said throttle valve and having a manually operable actuating `element located in juxtaposition to said handle for enabling the operator to control the pressure Within said feeding means by but a single hand Without removing said hand from said throttle valve operating handle.

10. A drilling mechanism comprising fluid actuated work performing and feeding means, means including a rotatable valve andV passage' means controlled' thereby for controlling the lsupply of motivel fluid to both of said means provided with an operl ating handle adapted to be grasped by the operator, and a coaxial-ly disposed valve for controlling only the feeding means, said said last mentioned valve being reciprocable axially with respect to said other valve and.

from said mechanism adapted to be grasped by the operator, and means for controlling said motor and feeding means including coaxial valves and a pivoted operating element forming parts of said control means, said pivoted` element being located adjacentv the grasped portion of said control means for enablingthe operator to control said motor and said feeding means by but a ysingle hand Without removingy said hand from .said control mea-ns. H

l2. A drilling mechanism.'comprising a drilling 'l motor and pressure fluid feeding means therefor, control means extending from said mechanism adapted to be grasped by the operator, and means for controlling said motor and feeding means includingrelatively movable coaxial valves one of which is rotatable While the other is reciprocable, and a pivoted operating element forming parts of said control means, said pivoted element being located adjacent the grasped portion of said control means for enabling the operator to control said motor and said feeding means by but a lsingle hand Without removing said hand from said control means.

13. A drilling mechanism comprising a fluid actuated motor and r'feeding means, a main throttle valve having means for controlling the fluid 'flow to said motor and to said feeding means, and lsupplemental feed controlling means for independently controlling the fluid flow to said feeding means including a longitudinally reciprocable valve arranged coaxially Within said main valve.

14:. A drilling mechanism comprising a fluid actuated drilling motor and pressure llo provided with a lever adapted to be grasped by the operator, said valve having means for controlling the fluid flow to said motor and to said feeding means7 and a supplemental feed controlling valve longitudinally reciprocable eoaxially within said throttle valve and operable independently thereof and having an independent control element so arranged as to enable the o ierator to control the pressure Within said feeding means by but a single hand without removing said hand form said throttle valve handle.

16. A drilling mechanism comprising a fluid actuated drilling motor and pressure fluid feeding means therefor, a throttle valve provided with a movahle handle adapted to be grasped by the operator for controlling the Huid iloiv to said motor and to said means, and a supplemental feed controlling valve including operating means associated with said handle and so arranged With respect thereto as to enable the operator to control the feed with but a single hand Without removing said hand from said handle.

17. A drilling mechanism comprising [luid actuated work performing and feeding means, independently operable valves, one of which has means for controlling both of said means and the other of which has means for controlling only the feeding means, said valves having overlying handles one of which is rotatable to effect control of its valve and the other of which is pivoted on said other handle and sWingable relative thereto in a plane at right angles to the plane of the movement of said `other handle;

18. A drilling mechanism comprising fluid actuated Work performing and feeding means, a valve having means for controlling both of said means and provided with an operating handle adapted to be grasped by the operator, and a valve having means for controlling only the feeding means, said valve being` provided with an operating handle which overlies said other handle in proximity thereto to enable the operator to control the feed by but a single hand Without removing said hand from said first mentioned handle.

i9. A drilling mechanism comprising (laid actuated Work performing and feeding moans, a valve having ineans'for controlling ooth of said means provided with an operating handle `adapted to be grasped by the operator, and a valve having means for con-I trolling only the feeding means, said valve being provided with an operating handle which overlies said other handle in proximity thereto and which is movable in a plane at right angles to the plane of movement of the other handle, the relative portions of said handles being such as to enable the operator to control the feed by but a single hand Without removing said hand from said iirst mentioned handle.

In testimony whereof I atlix my signa ture.

ELMER o. Gaiarin'. 

